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Titolo:
LATE PLEISTOCENE AND HOLOCENE PALEOENVIRONMENTS OF THE NORTH PACIFIC COAST
Autore:
MANN DH; HAMILTON TD;
Indirizzi:
UNIV ALASKA,ALASKA QUATERNARY CTR,907 YUKON DR FAIRBANKS AK 99775 US GEOL SURVEY ANCHORAGE AK 99508
Titolo Testata:
Quaternary science reviews
fascicolo: 5, volume: 14, anno: 1995,
pagine: 449 - 471
SICI:
0277-3791(1995)14:5<449:LPAHPO>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORDILLERAN ICE-SHEET; LATE WISCONSIN GLACIATION; QUEEN-CHARLOTTE-ISLANDS; SOUTH-CENTRAL ALASKA; YOUNGER DRYAS EVENT; SEA-LEVEL RECORD; BRITISH-COLUMBIA; NORTHWESTERN ALASKA; LAST GLACIATION; VEGETATION HISTORY;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
216
Recensione:
Indirizzi per estratti:
Citazione:
D.H. Mann e T.D. Hamilton, "LATE PLEISTOCENE AND HOLOCENE PALEOENVIRONMENTS OF THE NORTH PACIFIC COAST", Quaternary science reviews, 14(5), 1995, pp. 449-471

Abstract

Unlike the North Atlantic, the North Pacific Ocean probably remained free of sea ice during the last glacial maximum (LGM), 22,000 to 17,000 BP. Following a eustatic low in sea level of ca. -120 m at 19,000 BP, a marine transgression had flooded the Bering and Chukchi shelves by10,000 BP. Post-glacial sea-level history varied widely in other parts of the North Pacific coastline according to the magnitude and timingof local tectonism and glacio-isostatic rebound. Glaciers covered much of the continental shelf between the Alaska Peninsula and British Columbia during the LGM. Maximum glacier extent during the LGM was out of phase between southern Alaska and southern British Columbia with northern glaciers reaching their outer Limits earlier, between 23,000 and16,000 BP, compared to 15,000-14,000 BP in the south. Glacier retreatwas also time-transgressive, with glaciers retreating from the continental shelf of southern Alaska before 16,000 BP but not until 14,000-13,000 BP in southwestern British Columbia. Major climatic transitions occurred in the North Pacific at 24,000-22,000, 15,000-13,000 and 11,000-9000 BP. Rapid climate changes occurred within these intervals, including a possible Younger Dryas episode. An interval of climate warmerand drier than today occurred in the early Holocene. Cooler and wetter conditions accompanied widespread Neoglaciation, beginning in some mountain ranges as early as the middle Holocene, but reaching full development after 3000 BP.

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Documento generato il 11/07/20 alle ore 20:47:55